<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>变量的命名规范</title>
    <script>
        var app =10;
        var App=100;
        console.log(app);
        console.log(App);
        //console.log(tel);    //为声明为定义会报错
        console.log(name);      //name比较特殊虽然不是关键字，不是保留字，但是在有些浏览器中有特殊含义
                                //因此就不要用name作为变量名
    </script>
</head>
<body>
    
</body>
</html>